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Analog Devices Inc./Maxim Integrated MAX8877EUK22
- Part No.:
- MAX8877EUK22
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK22.pdf
- Description:
- LOW-NOISE, LOW-DROPOUT, 150MILLI
- Quantity:
- Payment:
- Shipping:
Inventory:405
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Product details
Overview
MAX8877EUK22 from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 2.2V output, delivering up to 150mA from a 2.5V–6.5V input. It features 30µVRMS output noise, 165mV dropout at 150mA, and 100µA operating supply current independent of load or dropout condition. It is used in battery-powered handheld instruments and PCMCIA cards requiring stable, low-noise voltage regulation.
For engineers reviewing the MAX8877EUK22 datasheet, MAX8877EUK22 pinout, MAX8877EUK22 application, or MAX8877EUK22 equivalent, key selection criteria include output voltage accuracy (±1.4%), thermal shutdown at +155°C, reverse battery protection, and SOT23-5 thin-package compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8877EUK22 uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current loss. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
It integrates logic-controlled shutdown (10nA ISHDN), thermal overload protection with 15°C hysteresis, short-circuit current limiting (160–390mA), and reverse battery protection that limits reverse current to 1mA. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter for noise reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.2V preset (±1.4% accuracy over -40°C to +85°C), factory-trimmed, no external resistors required |
| Max Output Current | 150mA continuous; supports peak loads without thermal shutdown under proper PCB layout |
| Dropout Voltage | 165mV at 150mA load - enables operation down to VIN = 2.365V while maintaining regulated 2.2V output |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - suitable for noise-sensitive analog/RF circuitry |
| Quiescent Current | 100µA across full load range and dropout - preserves battery life in always-on portable systems |
| Shutdown Current | 10nA typical - reduces system standby power to negligible levels in sleep modes |
| Thermal Shutdown | Activates at +155°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload |
Pinout & Package
MAX8877EUK22 is packaged in a 5-pin SOT23-5 thin package (JEDEC MO-178AA), optimized for space-constrained portable designs. The GND pin serves dual roles as electrical ground and thermal path; soldering to a large copper area improves power dissipation capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient immunity |
| 2 - GND | Ground reference and thermal pad | Electrical return path and primary heat conduction route; must connect to large PCB copper area |
| 3 - SHDN | Active-low enable control | Pull low to enter 10nA shutdown; pull high (≥2.0V) or tie to IN for normal operation |
| 4 - BP | Bypass reference node | Connects to 0.01µF ceramic capacitor to reduce reference noise and lower output voltage noise |
| 5 - OUT | Regulated output terminal | Delivers up to 150mA; requires ≥1µF (ESR < 0.2Ω) ceramic cap for VOUT ≥ 2.5V; 3.3µF for 2.2V output |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 100µA quiescent current even in dropout or heavy-load conditions |
| Reverse battery protection | Blocks reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage in miswired battery compartments |
| Internal current limiting | Guarantees 160mA minimum current limit - protects downstream circuitry during output short-circuit events |
| Low-noise BP filtering | 0.01µF capacitor on BP pin creates 80Hz low-pass filter - reduces output noise to 30µVRMS without external op-amps |
| Thermal hysteresis | 15°C gap between shutdown activation (+155°C) and recovery - avoids oscillation during marginal thermal conditions |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
|
Use Scenario: Portable multimeters and data loggers powered by single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Primary 2.2V supply for precision ADCs, microcontrollers, and display drivers. Use Value: Low 30µVRMS noise ensures accurate analog measurements; 165mV dropout extends usable battery life to ~2.365V cell voltage. |
Use Scenario: Credit card-sized peripheral modules (e.g., modem, memory, GPS) inserted into laptop PCMCIA slots. IC Role / Device Role / Timing Role: Local LDO providing clean 2.2V rail for interface logic and flash memory I/O. Use Value: 100µA quiescent current minimizes standby drain; reverse battery protection safeguards against hot-swap polarity errors. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Legacy PDAs with ARM7-based SoCs requiring tightly regulated core or I/O voltage rails. IC Role / Device Role / Timing Role: Secondary 2.2V regulator for USB transceivers or touch-screen controllers. Use Value: Pin-compatible with '2982 footprint allows drop-in upgrade; thermal shutdown prevents overheating in sealed enclosures. |
Use Scenario: Battery-operated scheduling devices with LCDs and real-time clocks, often using coin cells or AA batteries. IC Role / Device Role / Timing Role: Main power source for RTC backup domain and low-power microcontroller peripherals. Use Value: 10nA shutdown current enables multi-year shelf life; ±1.4% output accuracy maintains timekeeping precision across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76322QDBVRQ1 | Higher 220mV dropout at 150mA; 45µVRMS noise; AEC-Q100 qualified | Automotive infotainment modules requiring extended temperature and reliability validation | Choose for automotive-grade qualification; avoid if board space or noise budget is constrained |
| MCP1702T-2202E/MB | Lower 178mV dropout; 40µVRMS noise; 2.5µA quiescent current but only 250mA max output | Cost-sensitive consumer electronics where ultra-low IQ is prioritized over noise performance | Prefer for sub-100µA IQ requirements; not suitable for noise-critical signal chains |
Compared with MAX8877EUK22, TPS76322QDBVRQ1 adds automotive qualification at the cost of higher noise and dropout, while MCP1702T-2202E/MB trades noise performance for ultra-low quiescent current - making MAX8877EUK22 optimal for handheld instrumentation demanding both low noise and moderate IQ.
Availability
MAX8877EUK22 is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8877EUK22 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and portable applications.
The MAX8877/MAX8878 family was designed specifically for battery-powered portable equipment requiring ultra-low noise, low dropout, and minimal quiescent current - targeting cellular telephones, cordless phones, and handheld computing devices.
FAQ
What is the output voltage tolerance of the MAX8877EUK22 over temperature and load?
The MAX8877EUK22 guarantees ±1.4% output voltage accuracy across the full -40°C to +85°C operating temperature range and for output currents from 0.1mA to 120mA. At +25°C and 0.1mA load, the tolerance tightens to ±1.4% (not ±1.0%). This specification ensures stable 2.2V regulation in battery-powered handheld instruments where supply headroom is limited and thermal cycling occurs.
Does the MAX8877EUK22 require an external BP capacitor, and what happens if it's omitted?
Yes, the MAX8877EUK22 requires a 0.01µF ceramic capacitor between the BP pin and GND to achieve its specified 30µVRMS output noise. Omitting this capacitor increases output noise to approximately 100µVRMS due to unfiltered reference noise. The device remains functional but fails to meet low-noise design targets for precision analog circuits - a critical consideration in MAX8877EUK22-based data acquisition systems.
Can the MAX8877EUK22 be used with input voltages below 2.5V?
No, the MAX8877EUK22 has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V may result in loss of regulation, increased dropout, or undefined behavior. For 2.2V output applications with sub-2.5V inputs, the MAX8877EUK22 is unsuitable - consider alternative regulators rated for lower VIN minima, such as the MAX8860 series.
How does the MAX8877EUK22 handle reverse battery connection?
The MAX8877EUK22 incorporates dedicated reverse battery protection that limits reverse current to ≤1mA when either the IN or SHDN pin falls below GND potential. This prevents damage to internal circuitry and parasitic diode conduction paths. Unlike basic diode-or solutions, this feature requires no external components and maintains full functionality after polarity correction - a key reliability advantage in MAX8877EUK22-deployed field-replaceable battery compartments.
Is the MAX8877EUK22 pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EUK22 is explicitly designed as a pin-compatible upgrade to the industry-standard '2982 family. It shares identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), enabling direct replacement without PCB modifications. However, MAX8877EUK22 delivers improved performance: lower dropout (165mV vs. typical 350mV), lower noise (30µVRMS vs. >100µVRMS), and tighter output accuracy (±1.4% vs. ±2%).
MAX8877EUK22 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX8877EUK22 FAQ
1.How can I place an order for MAX8877EUK22 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK22 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX8877EUK22 reliable?
The price and inventory of MAX8877EUK22 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK22 is usually 5 days.
3.What payment methods are accepted for MAX8877EUK22?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK22 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK22?
MAX8877EUK22 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK22 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX8877EUK22?
For technical support, including MAX8877EUK22 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK22 requirements.
6.How does Aetrix verify that MAX8877EUK22 is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK22 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX8877EUK22 meets industry standards.
7.What is the process for return or replacement of MAX8877EUK22?
All MAX8877EUK22 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK22, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX8877EUK22 part is unused and in its original packaging.
Return procedure for MAX8877EUK22:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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